Insects Active at night

Setaceous Hebrew Character

Xestia c-nigrum

iNaturalist Wikipedia

Named for the cryptic, ancient-looking symbol on its wings, the Setaceous Hebrew Character is a master of the night. This resilient moth is a frequent visitor to backyard gardens across the Northern Hemisphere.

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Quick Identification

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Size

Wingspan of 35–45 mm (1.4–1.8 inches); Body length approx 18–22 mm (0.7–0.9 inches)

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Colors

Forewings are typically a rich reddish-brown or purplish-brown, featuring a prominent black mark next to a cream-colored triangular patch. Hindwings are a translucent smoky-white with darker veins.

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Key Features

Distinct black 'C-shaped' or 'nun' mark on the forewing
Creamy-white triangular patch bordering the black mark
Rich reddish-brown ground color with a velvety texture
Two-toned wings with lighter, grayish-white hindwings
Typical 'Noctuid' resting position with wings folded flat over the back

When You’ll See Them

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Activity pattern Active at night

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Peak hours 9 PM - 3 AM

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Season May-September

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Diet Adults primarily feed on floral nectar from species like Buddleia, Ivy, and Ragwort. Larvae are generalists, eating various low-growing plants including docks, nettles, and willowherbs.

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Habitat Highly versatile; found in suburban gardens, urban parks, woodland edges, hedgerows, and agricultural fields.

Behavior

The Setaceous Hebrew Character is a highly successful nocturnal moth known for its strong flight and adaptable nature. During the day, it remains perfectly still, resting on tree trunks, fences, or hidden within low-lying foliage. Its mottled brown coloration provides excellent camouflage against bark, protecting it from avian predators. Once dusk falls, it becomes highly active, seeking out nectar sources or mates.

This species is particularly well-known for its attraction to artificial light sources, making it a frequent visitor to porch lights and lighted windows. Unlike some moth species that have a very short flight window, the Setaceous Hebrew Character typically produces two generations per year (and sometimes a third in warmer climates), meaning it can be spotted from late spring all the way through the first frosts of autumn. It is a solitary creature, though many individuals may congregate around a single high-quality food source or light trap.

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Camera Tips

To capture high-quality images of the Setaceous Hebrew Character, an AI-powered camera should be positioned near a light source or a bait station. These moths are strongly phototactic, so placing a camera near a UV lamp or a white sheet illuminated by a porch light is the most effective way to guarantee a 'visit.' Set your camera's focus distance to a fixed point on the landing surface—usually about 12 to 18 inches away—to ensure the intricate wing patterns are sharp.

For those who prefer a more natural setup, 'sugaring' is a classic and highly effective technique. Mix overripe bananas, dark brown sugar, and a bit of stout or beer into a thick paste and let it ferment for a day. Paint this mixture onto a tree trunk at eye level and mount your camera nearby. The Setaceous Hebrew Character is a frequent visitor to these sweet, fermented stations, and they often stay still for long periods while feeding, allowing for excellent macro shots that reveal the distinctive 'C' mark on their wings.

Since these moths are most active on warm, humid, and overcast nights, check your local weather forecast for nights when the temperature stays above 10°C (50°F). In your camera settings, utilize a fast trigger speed or a burst mode. If your equipment supports infrared (IR) night vision, ensure the IR intensity is balanced; the reflective scales on moth wings can sometimes 'blow out' or overexpose the image if the flash is too close. A slight angle to the side rather than a direct frontal flash often yields better detail.

Similar Species

Species that look similar or are commonly confused with Setaceous Hebrew Character.

Double Square-spot

Lacks the bright cream-colored triangular patch and features two dark, squarish spots instead of the 'C' mark.

Triple-spotted Clay

Generally has a more uniform pinkish-brown color and the dark spots are smaller and less distinct than the Hebrew Character's 'C'.

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Frequently Asked Questions

These moths are strictly nocturnal. They emerge shortly after sunset and are most active during the darkest hours of the night, typically between 10 PM and 2 AM.

You can attract them by planting night-blooming flowers like Evening Primrose or Jasmine. They are also highly attracted to UV light traps and fermented 'sugar' baits painted on tree trunks.

Adults drink nectar from various flowers, especially Ivy and Buddleia. Their caterpillars (larvae) are generalists and feed on common garden plants like docks, plantains, and nettles.

Yes, they are one of the most common noctuid moths in suburban environments because their larvae can survive on a wide range of common garden weeds and ornamental plants.

The key is the 'C-nigrum' mark: look for a sharp black C-shaped squiggle directly adjacent to a bright, pale-cream triangular patch on the forewing. Other similar brown moths lack this specific, high-contrast combination.

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